JPS5917499A - Mounting structure of attachment in industrial car - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an attachment structure for an industrial vehicle such as a forklift.

To explain a forklift truck as an example of a conventional industrial vehicle, a mast 3 connected to a Chilton cylinder 2 is provided on the front side of a vehicle main body I shown in FIG. The fork 5 is slidable in the vehicle width direction against a pair of upper and lower finger bars ηa, 41bl in the vehicle width direction fixed to the inner mast side. The installed configuration is usually adopted.
, ub and the fork 5 are attached to a pair of upper and lower finger pars 44a, ≠b1, which are fixed to a vertically moving carriage 61, as shown in the partial cross-sectional view of FIG.
A hook 5a formed at the upper end of the fork 5 and a jaw 5b formed below the fork 5 are slid together, and the hook 5a
A lock pin 7 is passed through the fork 5 from above, and the fork 5 is locked at the fixed position. The conventional structure described above has the disadvantage that a gap δ is likely to occur at the contact portion between the fork 5 and the finger bars 4ia and +4b, especially between the lower finger bar vb and the fork 5.

That is, in a loaded state, the fork 5 is pressed against the finger bar due to the load (moment), and the gap δ/bar does not occur, but when the fork 5 is unloaded and a large vehicle is running idle, This is likely to occur as rattling in the fork 5, and the interference between metals causes an unpleasant sound to the surrounding area, which increases worker fatigue and causes noise to the surrounding area.

The present invention solves the existing drawbacks of the conventional attachment structure for an industrial vehicle as described above, and stabilizes the connection state between the attachment and a supporting member such as a finger bar fixed on the vehicle side. Therefore, the object of the present invention is to provide a mounting structure that eliminates the backlash between the attachment and the support member and the generation of noise caused by it, and in order to achieve this purpose, the support member and the attachment The purpose of the present invention is to provide a mounting structure for an attachment for an industrial vehicle, the gist of which is that an elastic material is interposed in the contact portion of the attachment.

FIG. 3 shows a first embodiment of the present invention, and shows the case where the present invention is applied in a cross section taken along the line A-A in FIG. ,8b
are recessed, and disc springs 9a, 9b as elastic members are inserted into the counterbore holes 8a, Bb. disc springs 9a, 9
When the tip of b is in elastic contact with the lower finger bar tb, and there is a heavy load on the fork 5, the disc springs 9a and 9b are both in a compressed state and the fork 5 and the lower part are in a compressed state. Although it is in close contact with the finger bar *b, when the fork 5 is empty, the disc springs 9a, C) and b are designed to maintain the gap δ generated between the fork 5 and the lower finger bar eb by stretching. , acts as a lever to prevent rattling between the two. Similarly, the lower part of the fork 5 is formed with a jaw 5b shown in FIG. Of course, it is regulated. According to the first embodiment, interference between the fork 5 and the lower finger bar UB when f falls during idle running (backlash due to this),
Besides, the fork 5 can prevent the generation of noise.
To install the fork 5, loosen the lock pin 7 and slide the finger bars qa and ψbl to change the position.
When sliding the fork 5, the fork 5 and the lower finger bar UB are in point contact (close state), which also has the effect of allowing extremely easy sliding movement without requiring any effort. There is.

FIG. 4 shows a second embodiment of the present invention, in which diaphragm springs 10a and 10b as elastic members are fitted in place of the disc springs 9a and 9a of the first embodiment. . In this embodiment, there is also one diaphragm spring 10a, and one hollow part of IOb, which is filled with grease 11.

11, and is a diaphragm spring 10a.

Grease holes 12 and 2 are provided at the tip of 10b.

In the case of the second embodiment, the effect of preventing rattling and noise caused by the gap δ between the fork 5 and the lower finger bar ψ9 is the same as that in the first embodiment I.
1 kug when compressing diaphragm springs 10a and 10b I)
- Grease is discharged from the grease holes 12, 12, and when the spring returns, the action of sucking the discharged grease again increases (1).Thus, the diaphragm type springs 1θa, 70b are prevented from being worn out and their durability is increased. This has the effect of improving the sliding properties of the fork (during stretching and sliding movement of the fork 5).

FIG. 5 shows a third embodiment of the present invention.
A sectional view taken along line B-B in FIG.
It is characterized in that two coiled helical springs 13a and 13b are fitted and arranged. Also in this embodiment, due to the elastic force 1 of the helical springs 13a, 13b,
The effect of preventing rattling and noise caused by the gap δ1 generated between the fork 5 and the lower finger bar IIb is obtained,
Ru.

FIG. 6 shows a fourth embodiment of the present invention, in which the elastic material is of a double structure similar to the disc springs 9a and 91d used in the first embodiment, which was explained in FIG. Belleville spring 14
a, 14b, and steel balls 15a, 15b sandwiched at the center of the disc springs 14a, 14b, respectively.

Embodiment 1 Fl, Belleville springs 14a, 14b
The elastic force 1 of the steel balls 15 a and 1 prevents rattling and noise caused by the same gap δ1 as described above.
5 The rolling friction caused by the rotation of b causes the fork 5
This has the effect of reducing (~obtaining) the sliding resistance with the lower finger bar μb when it slides.

FIG. 7 shows a fifth embodiment of the present invention, in which elastic rubbers 16a and 16b are fitted as elastic members in place of the springs employed in the previous embodiments. If an abrasive material having an appropriate elastic modulus is selected as the elastic rubbers 16a and 16b, the gap δ obtained in each of the above embodiments (the effect of preventing rattling caused by this and noise) can be obtained.
The fia, 16b can be inserted and removed in the same way as J8, and has the advantage of being low in cost.

FIG. 8 shows the disc spring 17 adopted in each of the above embodiments.
The figure shows a mechanism for inserting and holding the fork 5 into the counterbore hole 18 on the back side of the fork 5. FIG. Taper the disc spring 17 so that it widens inward.
1,000 people. The state shown in FIG.

The disc spring 17 has a degree of freedom against external pressing force and can be constructed so that it does not easily fall off.

The same figure (B) shows the state in which the wall surface of the dungeon hole 18 (this step IS B is attached and the Belleville spring 17 is press-fitted and set, and it brings about the same action and effect as in the same figure (A). .The same figure (c) shows a state in which a cape cut portion 18c is provided on the wall of the counterbore hole 18, and a hollow round screw 19 is screwed and fastened after the disc spring 17 is installed.The disc spring 17 is press-fitted. It has the advantage that it can be easily set and replaced, and is highly stable when set.

FIG. 9 shows a sixth embodiment of the present invention, and as disclosed in the (a) side sectional view and (b) rear view of the same figure,
Elastic material attachment parts 20a and 20b according to the present invention 1 are provided at the contact area between the hook 5a formed at the upper end of the fork 5 and the upper finger par 1a, and Similar elastic material mounting portions 21a, 21b are provided at the contact portion 1 between the jaw 5b and the lower finger bar 41b.The upper elastic material mounting portions 20a, 20b and the lower elastic material mounting portions The attachment portions 21a and 21b may be tilted or provided only on one side, or of course may be provided on both sides.FIG. 10 shows the above-mentioned elastic material attachment portion 20a, ie, the portion shown in FIG. 9(B). A fourth embodiment of the present invention is shown in the cross-sectional view taken along the line C-C. (See Fig. 6) A double structure disc spring 14a and a steel ball 15a held in the center of the disc spring 14a (this configuration 1) a is in contact with both the protruding inclined surface qC and the flat surface gd of the upper fin cover 4fa, and the elastic force of the disc spring +4a (thus, the fork 5 and the upper finger bar <ja/-
Closing the gap δ has the effect of reducing the sliding resistance during each sliding movement of the fork 5, resulting in the effect of stabilizing the operability during the sliding movement. It goes without saying that an elastic material similar to that described above can also be inserted between the jaw 5b formed at the lower part of the fork 5 and the lower finger bar u'o. It goes without saying that the example can be adopted [7].

It goes without saying that the present invention can also be applied between the upper finger bar 4fa and the fork 5, or between the upper finger bar fa and the hook 5a.

Although the present invention (1) has been explained in detail above, the present invention (according to this, the support member 1 for finger bars etc. fixed to the vehicle side) has been explained in detail.
On the other hand, in addition to installing attachments such as forks, by intervening and installing an elastic material on the contact part between the two, we can eliminate the rattling that occurs when the vehicle is mainly idle.
In addition to being able to prevent the generation of noise, it also has the advantage of lowering the sliding resistance when sliding forks, etc., and can be applied to industrial vehicles such as forklifts. Extremely effective.

[Brief explanation of the drawing]

Figure 1 is a side view showing the entire forklift, 81!2
The figure is a partial side sectional view showing the mounting structure of the fin carver and the fork, FIG. 3 is a partial side sectional view showing the first embodiment of the invention, and FIG. 4 is a partial side sectional view showing the second embodiment of the invention. The cross-sectional view and phase 5 diagram show the third embodiment of the present invention (A) part 111
111 sectional view, (b) BB sectional view of the same figure (a), No. 6
[FIG. 7 is a partial side sectional view showing the fourth embodiment of the present invention, FIG. 7 is a partial side sectional view showing the fifth embodiment of the present invention, and FIG.
A), (B), and (C) are partial side sectional views showing the mechanism for fitting and holding the Ii and RL springs adopted in each of the above-mentioned embodiments into the counterbore holes, and FIG. FIG. 10 is a partially enlarged sectional view of the sixth embodiment, showing (a) a partial side sectional view, middle) a rear view thereof, and FIG. #a, Ilb...Finger bar, 5...Fork,
5a... hook, 5b... jaw, 8 a, 8
b, 18...socket hole, 10 a, , 10
b...Diaphragm spring (elastic material), 9a, 9
b, 14a, 14b, 17... Belleville spring (
elastic material), 15 steel ball, 16...elastic comb.
'Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 (A) (B)
(Nori Figure 9

Claims (1)

[Claims] (1) On the industrial vehicle side (with respect to the fixed support member, the attachment position in the vehicle width direction is arbitrary) An industrial vehicle that can be equipped with an attachment that can be changed; A mounting structure for an attachment in an industrial vehicle, characterized in that the contact portion is mounted via an elastic material.